The weld in bungs should be mounted 1.25″ from the header flange. It can be mounted from any direction as long as it is 1.25″ from that header flange and the probe tip is able to reach the center of the tube.
Please keep in mind that these are general recommendations and you should consult your engine builder for a more specific number for you setup.
In the 1/4 mile Gas should read 1350-1400 and Methanol 1150-1200
In the 1/8 mile Gas should read 1250-1300 and Methanol 1050-1100
Hold down the reset button while powering up the EGT Plus. Continue to hold the Reset button for 5 seconds and you have performed a factory reset.